The 3-D imaging calculation evaluates the following parameters: absolute volume, absolute volume change, location of expansion, base width, breast projection and contour symmetry. Older methods of volume assessment would assume that the base of the breast is a flat plane. The Vectra system takes into account the curvature of the chest wall, which results in a more accurate breast volume measurement. With 3-D imaging there is no exposure to radiation[16]. Another advantage to 3-D imaging is the option to view the subject's image at any angle, 360 degrees[17]. Our study would show the postoperative results of using the CPX3® tissue expander with an objective analysis of the degree of lower-pole expansion.